The lower Manhattan ­father who was swarmed and beaten up by a raging motorcycle gang last fall plans to sue the city and two of his alleged attackers, NYPD cops Wojciech Braszczok and Matthew Rodriguez.

Alexian Lien filed the complaint on behalf of his himself, his wife, ­Rosalyn Ng, and their ­2-year-old daughter who were in the family’s Range Rover during the brutal confrontation on Sept. 29, 2013.

“A vicious and unruly mob of motorcycle riders” “attacked and assaulted” Lien and “vandalized his motor vehicle” by smashing a rear window where his toddler was sitting, according to his notice of claim filed on Dec. 24.

Video footage shows Braszczok, an undercover detective, breaking one of the windows.

He pleaded not guilty to assault charges in November.

Lien is asserting that the NYPD was negligent for failing to properly hire and train its officers.

The Police Department identified Braszczok, Rodriguez and two other officers who were involved with the biker gang.

Rodriguez, an Internal Affairs cop, has said he was “nowhere near the scene” of the violence but admitted that he was riding with the bikers.

Eleven bikers have been arrested in the SUV melee.

Lien, 33, was driving the black SUV near 125th Street in Harlem when he was surrounded by the bike gang.

They pursued him 50 blocks up the West Side Highway to the 178th Street exit where he was pulled from his car while his terrified wife and daughter watched him get pummeled to a pulp.

A city Law Department spokeswoman said: “At this time, this is just a notice of claim — not a lawsuit.

“No city employees have asked our office to represent them. We will assess the available facts when, and if, we are asked to represent.”